The Dragon

iTrader: (6)

If you were cruising for a few hours, at what rpm could you travel safely without harming the motor?

3k? Higher? Lower?

Thanks in advance!

SuperSport01

As long as it runs cool, I dont believe 4K rpm would be a problem.

redtan

iTrader: (5)

RPM and heat kills motors (well besides freak accidents that can kill an engine while idleing), so by keeping it under 4k rpm and keeping it cool you should have no problem. 4k rpm is not really tough on the motor with proper cooling and lubrication (aka oil pressure).

Though if you had a car that was crusing on the highway at 4k+ rpm I wouldn't really call it a streetable car. Anything up to 3k is manageble and should be more than fine on any properly maintained engine.

Gordon0652

iTrader: (4)

I would not worry about it, make sure shes cool.

The Dragon

iTrader: (6)

Excellent. I'm only running 3.90 gears and I rarely travel at 2500 for long periods.

I was just curious if one were to drive on a de-restricted highway at +130 mph for an hour or so if the 3K rpm's would hurt.

Thanks for the replies guys!

Gordon0652

iTrader: (4)

Do not worry so much. My TBSS did 2600 rpm at 80 mph and i went from NY to VA with no problem straight threw.
Gas milage was not great but was not hurting the motor - totally stock.

You could go from NY to Cali at 4000 rpm on a stock motor and be fine, just depens on how you like your gas milage... lol

You'll be fine, really.

Higgs Boson

iTrader: (3)

I ran NHRA/IHRA for 15 years and when I started out we used a two car hauler truck/ramp/bed combo with a 454 in it running 3500 RPMs all the way from town to town. Never skipped a beat and pounded out a strong 5 MPGs.

SOMbitch

iTrader: (8)

Yeah think about race boats that run waaaay higher RPM all the time. Keep it cool and you'll be fine.....

crazboy99

if it helps out any, I am usually around 3000 to 3500 rpms constantly on the interstate... long road trips and 70 miles to and from work... car has never had a problem... knock on wood

mwg2600

Back before the Overdrive transmission, Cars would be reving higher on the highway. Theres nothing wrong with cruising at 4000. As long as the engine is balanced good enough for it.

The Dragon

iTrader: (6)

Thanks again for all the replies gentlemen.

Makes a lot of sense